| 摘要 |
A blower according to the present invention is provided with a blast fan, a motor that rotationally drives the blast fan, and a rotation shaft that is connected to the fan via a vibration prevention member and transmits rotation force of the motor to the fan, wherein the vibration prevention member is an elastic member connecting a metallic inner cylinder provided to the rotation shaft and a metallic outer cylinder provided to the blast fan, and an outer circumferential portion of the inner cylinder and/or an inner circumferential portion of the outer cylinder has a polygonal shape when viewed in a rotation shaft direction. According to the present invention, the rotation force received by the vibration prevention member acts as a compression stress on a bonding interface between the vibration prevention member and the metal. Therefore, it is possible to reduce a shear stress to the bonding interface between the vibration prevention member and the metal and reduce an excessive stress due to stress concentration. |
